Rails unable to autoload constant from file despite being defined in that file

Question

This is a tricky one to explain. I have a module in another module namespace like so:

# app/models/points/calculator.rb
module Points
  module Calculator
    de         


        

Answer 1

If someone is having this issue in rails 6 which has zeitwerk autoloader,

Change ruby constant lookup back to classic in your application.rb

# config/application.rb
#...
config.autoloader = :classic
#...

Read more details here Rails Official Guides